46 lines
1.4 KiB
Diff
46 lines
1.4 KiB
Diff
diff --git a/src/runtime/sys_darwin_amd64.s b/src/runtime/sys_darwin_amd64.s
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index e09b906ba5..fa8ff2f65c 100644
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--- a/src/runtime/sys_darwin_amd64.s
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+++ b/src/runtime/sys_darwin_amd64.s
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@@ -157,6 +157,7 @@ systime:
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// Fall back to system call (usually first call in this thread).
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MOVQ SP, DI
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MOVQ $0, SI
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+ MOVQ $0, DX // required as of Sierra; Issue 16570
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MOVL $(0x2000000+116), AX
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SYSCALL
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CMPQ AX, $0
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diff --git a/src/syscall/syscall_darwin_amd64.go b/src/syscall/syscall_darwin_amd64.go
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index 70b53b87f4..79083117b6 100644
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--- a/src/syscall/syscall_darwin_amd64.go
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+++ b/src/syscall/syscall_darwin_amd64.go
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@@ -26,14 +26,21 @@ func NsecToTimeval(nsec int64) (tv Timeval) {
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}
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//sysnb gettimeofday(tp *Timeval) (sec int64, usec int32, err error)
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-func Gettimeofday(tv *Timeval) (err error) {
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- // The tv passed to gettimeofday must be non-nil
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- // but is otherwise unused. The answers come back
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- // in the two registers.
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+func Gettimeofday(tv *Timeval) error {
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+ // The tv passed to gettimeofday must be non-nil.
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+ // Before macOS Sierra (10.12), tv was otherwise unused and
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+ // the answers came back in the two registers.
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+ // As of Sierra, gettimeofday return zeros and populates
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+ // tv itself.
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sec, usec, err := gettimeofday(tv)
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- tv.Sec = sec
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- tv.Usec = usec
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- return err
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+ if err != nil {
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+ return err
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+ }
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+ if sec != 0 || usec != 0 {
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+ tv.Sec = sec
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+ tv.Usec = usec
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+ }
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+ return nil
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}
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func SetKevent(k *Kevent_t, fd, mode, flags int) {
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